FROM

1250-2050lb-ft Torque Input

12Speeds

TOP GEAR

DIRECT or OVERDrive

DETROIT™ DT12™

TRANSMISSION

THE BEST DETROIT IS PROUD TO OFFER THE DT12™ AUTOMATED MANUAL TRANSMISSION. ENGINEERED AND BUILT WITH PRECISION. OPTIMIZED FOR PERFORMANCE AND EFFICIENCY.

WHAT’S AN AUTOMATED MANUAL TRANSMISSION? An automated manual transmission (AMT) combines a traditional

clutch-actuated manual gearbox with a computer-controlled

shift actuator and clutch. The best shift patterns are selected

electronically to provide optimal power and fuel efficiency. An

AMT is a proven technology used around the world. At Detroit, we

believe it represents the next generation. With computer-controlled

shifting and clutch engagement, only two pedals are needed to

operate the truck: brake and accelerator.

WHY CONSIDER AN AMT?An automated manual transmission is more fuel-efficient, especially

when you average fuel consumption over an entire fleet traveling

a variety of routes. Automated control of the clutch improves shift

quality and leads to longer clutch life. And it’s easier to operate,

making it ideal for drivers of all experience levels.

DT12 FUEL ECONOMY IMPROVEMENT

OF BOTH WORLDS

THE DETROIT™ AUTOMATED MANUAL TRANSMISSION

All Data Manual All Data DT12

FLEET AVERAGE FUEL ECONOMY

The DT12 will narrow the bell curve of your drivers’ fuel economy. Fleets should see fuel economy improvements for new and lead-footed drivers.

Note: Numbers are for demonstration purposes only. Not based on actual testing.

ULTIMATE EFFICIENCY: IT’S THE RESULT OF KNOWLEDGE AND INGENUITY.

We understand how fleets work and how they succeed. Any

incremental increase in fuel economy can make a huge impact

on profitability. Our engineers have made significant strides to

reduce fuel consumption with this new transmission.

A fleet’s bottom line also is affected by the durability and

longevity of its vehicles. The operation of our DT12 was designed

to limit unnecessary wear and tear. The smoother the action, the

more efficient the results.

Driver recruitment, training and performance play crucial

roles in fleet efficiency. That’s why we chose to offer an

AMT. It’s easy to master, so drivers can reach their optimal

performance sooner.

The Detroit DT12 is part of our complete line of powertrain

components that also includes our famous engines and our

full line of axles. When you spec your truck with the entire

package, you can expect an even greater level of efficiency, from

operational performance to maintenance and warranty service.

Ultimate efficiency goes beyond managing fuel consumption.

It’s the result of knowledge and ingenuity. That’s what makes this

transmission different.

EASE AND ECONOMY GO INTO HIGH GEAR.

At Detroit, we are focused on providing our customers with the

most efficient powertrain components possible. The Detroit DT12

provides efficiency in three ways: fuel economy, durability and

ease of operation.

OF BOTH WORLDS

ECONOMYENGINEERED FOR

THE DETROIT DT12 IS A 12-SPEED, AUTOMATED MANUAL TRANSMISSION WITH SHORTER GEAR STEPS. THE DETROIT DT12 WAS DESIGNED WITH A NUMBER OF INNOVATIVE EFFICIENCY FEATURES TO ACHIEVE OPTIMAL FUEL ECONOMY.

Oil Pump. An oil pump, powered by the countershaft, delivers oil directly to the gears. This is more precise and efficient than bathing all of the gears in oil.

Optional Direct Drive. In top gear, the transmission operates as a direct drive, sending engine input directly through the main shaft, eliminating parasitic gear mesh losses of power and increasing fuel efficiency.

eCoast. Helps maximize fuel efficiency by allowing the vehicle to coast down grades. The engine operates at idle speeds while maintaining momentum. Sophisticated transmission electronics ensure safe operation in all driving conditions.

Skip Shift. To increase shifting efficiency, the electronic powertrain controls automatically skip unnecessary gears. This helps increase acceleration to achieve cruising speed quickly and smoothly. This also lets the driver begin the acceleration in the appropriate start gear based on load and grade.

Total Weight. The Detroit DT12 provides a weight advantage over traditional designs. The aluminum housing and single countershaft help save weight, allowing for even more payload efficiency.

Powertrain Communication. The transmission communicates in real time with the proprietary powertrain network and motor-control module to optimize efficiency throughout the entire powertrain.

Active Driveline Protection. The Transmission Control Module (TCM) calculates the torque wind-up in the driveline and regulates with engine torque control for enhanced driving comfort and less driveline wear. The TCM even limits torque in severe surface conditions, protecting the driveline.

ECONOMYENGINEERED FOR

Oil Pump. An oil pump, powered by the countershaft, delivers oil directly to the gears. This is more precise and efficient than bathing all of the gears in oil.

VARIABLE-SPEED CRUISE CONTROL

The DT12 incorporates variable-speed cruise control, which allows the engine brake to regulate speed to

achieve optimal driving efficiency. With the engine brake set to off, drivers can choose from the three settings

on the cruise control limit switch located on the dash:

LOW is ideal for steep grades. The engine brake slows the truck at a low threshold, e.g., +3 mph.

MEDIUM is ideal for rolling hills. The engine brake slows the truck at a higher threshold, e.g., +6 mph.

OFF is ideal for flat terrain or areas with noise restrictions. The engine brake is disabled while in cruise.

Variation level can be changed as a parameter in the TCM. Using these settings helps control downhill

speed and takes advantage of uphill momentum. The TCM will determine the right amount of engine braking

required, or may be overridden using the engine brake selection on the shift lever.

INTELLIGENT POWERTRAIN MANAGEMENT

Intelligent Powertrain Management knows the route ahead and will accelerate, preselect gears, eCoast

and brake the engine to maximize efficiency. Using preloaded terrain maps, IPM will adjust the following

to ensure the truck is carrying the most efficient momentum into road conditions ahead.

– DT12 shift strategy – eCoast

– Engine torque output – Engine braking level

Since IPM is integrated with cruise control, there are ideal driving situations and terrains where the fuel

efficiency benefit is greatest. Also, the more time spent in cruise control, the more effectively IPM will work.

– High top gear and top-1 gear times – High cruise control times

– Rolling terrain – Mountainous terrain

– Varying speed limits

Normal Driving Situation Driver Decision Intelligent Powertrain Management

Approaching a grade Downshift and accelerateHold gear (DT12 can shift while climbing) and minimal acceleration (calculated within CPC)

Cresting a hill Upshift and resume cruise controleCoast over the summit and engine brake when

speed approaches CC-band limit

Rolling hills Accelerate uphill and decelerate downhillTransition from deceleration to acceleration (and vice versa)

while still on grade to carry momentum into the next hill

Total Weight. The Detroit DT12 provides a weight advantage over traditional designs. The aluminum housing and single countershaft help save weight, allowing for even more payload efficiency.

Detroit transmissions are sold and serviced by an unmatched

network of knowledgeable sales people and expert factory-

trained technicians at hundreds of locations throughout the

United States and Canada. We also offer a live Customer

Support Call Center.

Detroit offers outstanding parts availability, and transmission

owners enjoy comprehensive warranty coverage—including

fast, hassle-free processes—and expedited parts and service

for critical downtime situations.

WARRANTY COVERAGE

Detroit is known for designing and manufacturing products

that set industry standards. We are proud of that, and

believe that quality is the surest way to maintain long-lasting

relationships with our customers. And it lets Detroit offer

excellent warranty coverage. Our transmissions come with a

five-year/750,000-mile standard warranty. The clutch comes

with a three-year/350,000-mile warranty.

SERVICE TAKEN TO A HIGHER LEVEL

Creep Mode makes backing up to a loading dock safe and easy.

PERFORMThe DT12 is engineered for enhanced flexibility and drivability.

The term “automated” means a pneumatic clutch and shift actuator

actually shift the transmission for you. This allows faster and

smoother gear shifts than electronic actuation.

Drivers can choose between shift modes depending on the

package spec’d with the DT12:

ECONOMY PACKAGE only includes automated economy mode.

Shifts happen automatically and keep RPMs to an efficient level.

STANDARD PACKAGE includes automated economy and manual

shift modes, for when terrain or conditions need manual control.

PERFORMANCE PACKAGE includes the standard package plus

automated performance mode, with higher RPM shifts to take full

advantage of available power and torque. A kickdown accelerator

pedal is also included that downshifts or holds a lower gear at

full throttle.

An additional performance feature:

CREEP MODE modulates the clutch to improve low-speed

maneuverability, ideal for backing up to a loading dock or

maneuvering through tight city traffic. All the driver has to do

is let off the brake pedal.

DRIVEN TO

Detroit DT12 Specifications

Speeds 12 forward / 4 reverse

Torque Ratings 1250–2050 lb-ft

Gear Ratios / Overall RatioDirect Drive: 14.93 - 1 / 14.93Overdrive: 11.67 - 0.78 / 14.96

GCW LimitsDirect Drive: 80,000 lbs.Overdrive: 130,000 lbs.*

Dry Weight 518–639 lbs.

Oil Capacity 10.7–15.4 qts.

*With a dual-plate clutch. Application approval required.

VIRTUAL TECHNICIAN

Our factory-installed Virtual Technician onboard diagnostic

system takes the guesswork out of transmission repair. When

a truck’s transmission check light illuminates, information

is sent to you and the Detroit Customer Support Center

(CSC), where a trained representative can diagnose the issue,

recommend service and even contact the nearest authorized

locations with parts in stock. The CSC can tell you if you need

to pull over, so you don’t cause further damage, or if you can

stay on the road. Put simply, it’s like having a technician in

every truck.

SAFETYKEEP DRIVERS SAFE AND FLEETS MOVING.

The DT12 includes a variety of innovative safety features that help protect the driver and entire vehicle, as well as enhance the

driving experience. Because the transmission is automated, new drivers experience a shorter learning curve. Various driver inter-

faces have been designed to reduce driver fatigue, including a true two-pedal system along with convenience features like the

shift lever and cruise control. Other advanced features include:

HILL START AID

When stopped on grades of 6% or more, the vehicle is

prevented from rolling backward on uphill grades or forward

on a downhill grade.

AUTO NEUTRAL

When the parking brake is engaged or the vehicle is shut

down, the transmission electronically commands neutral gear.

The shifter must be moved to N (neutral) before the truck is

started again.

VIRTUAL TECHNICIAN™ ONBOARD DIAGNOSTIC SYSTEM

Prevents unsafe driving situations from occurring by alerting the

driver to engine or transmission faults that could cause damage.

The shift lever includes gear, auto/manual mode and engine brake selection for excellent ergonomics.

If the vehicle is stopped on an incline, the Hill Start Aid prevents rollback.

INNOVATIONS IN

Virtual Technician’s optional Visibility Package is a fleet

management system that offers access to the Ground Traffic

Control website. This groundbreaking system captures latitude,

longitude, time and odometer readings for your trucks. With

pinpoint accuracy, the system records vehicle stops, speeds,

routes traveled, mileage by state, excessive idling, fuel

consumption and other onboard events. The Visibility Package

helps you manage your business more efficiently.

DDC-EMC-BRO-0069-0814. Specifications are subject to change without notice. Detroit Diesel Corporation is registered to ISO 9001:2008. Copyright © 2014 Detroit Diesel Corporation. All rights reserved. Detroit™ is a brand of Detroit Diesel Corporation, a subsidiary of Daimler Trucks North America LLC, a Daimler company.

DEMANDDETROIT.COM

Here at Detroit, we’ve built our reputation by building high-quality products that perform

beyond expectations. Today, you’ll find our engines in Freightliner and Western Star trucks

on roads and at job sites around the globe.

The secret to our success goes beyond the engines we build. Our people and our continuous

pursuit of innovation are powerful driving forces. Our engineering and manufacturing

expertise are world-class. Our service network is expansive and responsive. That’s why

we continue to grow and evolve. It’s also why we now offer a full line of products: engines,

axles, transmissions and advanced technologies. That’s right. The company that makes

the heart of the truck now gives you the arms, legs and backbone to go with it. So, if you

demand it all, demand Detroit.

EMPOWERED BY DETROIT